The best lawn bowls measure is the one that answers the question without disturbing the head. A compact box measure suits many everyday decisions, but string, callipers, feeler gauges and wedges each solve a different problem.
Flexible or box measure
A flexible box or bullet measure is the everyday choice for bowls that are close to the jack but too far apart to judge confidently. Set it from the nearest point of the jack to the nearest point of the first bowl, lock the distance and compare the second bowl without changing the setting.
String measure
A string measure handles distances beyond the range of a short flexible measure. The World Bowls laws specifically prefer a flexible or string measure when measuring between a jack in the ditch and a bowl on the green, or the reverse. Keep the line straight and avoid dragging it across the head.
Callipers and feeler gauges
Callipers are designed for tiny gaps where a tape end is too bulky. Feeler gauges go finer still, helping compare very small spaces without forcing equipment between the objects. Use the lightest contact possible; the goal is evidence, not pressure.
Wedges
A leaning bowl can fall while the shot is being decided. Wedges support it before another bowl is removed or measured. If either side asks for the 30-second settling period after the last bowl, a bowl likely to fall must not be secured during that period.
Long tape and boundary equipment
An umpire’s kit also includes a tape at least 25 metres long for mat, jack and rink distances. A retractable line, mirror and square, liner siter or boundary scope can decide whether a jack or bowl lies inside a side boundary.
Where a phone camera fits
Camera-assisted measurement gives players a fast overhead view, ranked bowl positions and edge-to-edge distances. It is especially useful in social play, practice and as a shared visual reference before reaching for another tool.
It should be treated as decision support. Suitable lighting, a clear view and a compatible device matter. In a competition, use the official equipment or umpire whenever the Conditions of Play require it.
A calm measuring sequence
Wait until the end is complete and any requested settling period has passed.
Remove only bowls already agreed as shots and keep them grouped.
Choose the least intrusive tool that reaches the distance.
Measure between the nearest points of jack and bowl.
If players cannot agree, stop and call the umpire.
WGTS puts a quick camera check in your pocket and also keeps digital scorecards, so the close call and the result can stay part of one simple routine.
Take a clearer view onto the green
WGTS brings camera-assisted bowl measurement and digital scorecards to your phone. Use it as a decision-support tool for social play and practice; for competition decisions, follow your club and event rules and call the umpire or use an official measure whenever required.
Download WGTS for iPhone or get WGTS on Google Play.
Rules note: this guide is based on the World Bowls Laws of the Sport, Crystal Mark Fourth Edition. Domestic regulations and a competition’s Conditions of Play can add to or vary some procedures. Check the rules for your event.